BP SPAC Sponsor II LLC - 29 Sep 2025 Form 3 Insider Report for StoneBridge Acquisition II Corp (APAC)

Role: 10%+ Owner
Signature: /s/ Bhargava Marepally, as Managing Member of BP SPAC Sponsor II LLC
Issuer symbol: APAC
Transactions as of: 29 Sep 2025
Net transactions value: $0
Form type: 3
Filing time: 03 Oct 2025, 19:50:53 UTC
Next filing: 06 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
BP SPAC Sponsor II LLC	10%+ Owner	1104 LINNEA LN, SUITE 8500, SOUTHLAKE,	/s/ Bhargava Marepally, as Managing Member of BP SPAC Sponsor II LLC	03 Oct 2025	0002089984

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	APAC	Class B Ordinary Shares							29 Sep 2025	Class A Ordinary Shares	1,091,667		See footnote	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	As described in the issuer's registration statement on Form S-1 (No. 333-286983) under the heading "Description of Securities - Ordinary Shares - Founder Shares", the Class B Ordinary Shares will automatically convert into Class A Ordinary Shares at the time of the issuer's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.
F2	These shares represent the Class B Ordinary Shares directly held by StoneBridge Acquisition Sponsor II LLC (the "Sponsor"), acquired pursuant to a subscription agreement by and between the Sponsor and the issuer. BP SPAC Sponsor II LLC is the managing member of the Sponsor. Bhargav Marepally and Prabhu Antony are the managing members of BP SPAC Sponsor II LLC, and have voting and investment discretion with respect to the Class B Ordinary Shares held directly by the Sponsor. Each of Mr. Marepally and Mr. Antony disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest each may have therein, directly or indirectly.

Content

As described in the issuer's registration statement on Form S-1 (No. 333-286983) under the heading "Description of Securities - Ordinary Shares - Founder Shares", the Class B Ordinary Shares will automatically convert into Class A Ordinary Shares at the time of the issuer's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

These shares represent the Class B Ordinary Shares directly held by StoneBridge Acquisition Sponsor II LLC (the "Sponsor"), acquired pursuant to a subscription agreement by and between the Sponsor and the issuer. BP SPAC Sponsor II LLC is the managing member of the Sponsor. Bhargav Marepally and Prabhu Antony are the managing members of BP SPAC Sponsor II LLC, and have voting and investment discretion with respect to the Class B Ordinary Shares held directly by the Sponsor. Each of Mr. Marepally and Mr. Antony disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest each may have therein, directly or indirectly.